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Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →A torpedo travels underwater; an anti-ship missile flies through the air to attack a surface vessel. Their names describe different things: “torpedo” identifies a weapon type and operating medium, while “anti-ship” identifies a missile’s mission. Some torpedoes target submarines, some can attack surface ships, and a missile can even carry a torpedo toward a submarine.
What is the core difference?
| Comparison | Torpedo | Anti-ship missile |
|---|---|---|
| Where it travels | Underwater | Through the air |
| What the name describes | A weapon that moves underwater | A missile intended to attack a surface ship |
| Typical target | Submarines or, depending on the model, surface ships | Surface ships |
| Launch platform | Depends on the model; examples include submarines, surface ships and aircraft | Depends on the model; Harpoon can be launched from ships, submarines, shore batteries or aircraft |
These are broad categories, not two single weapons with fixed performance. Launch platform, guidance and intended target vary by system. There is no fair universal comparison of their range, speed, cost or effectiveness: those figures depend on the particular weapons and operating conditions.
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How do torpedoes differ by mission?
Heavyweight torpedoes can serve against submarines and surface ships
The U.S. Navy describes the MK-48 as a submarine-launched heavyweight torpedo used in anti-submarine and anti-surface roles. Its fact file calls it acoustic-homing and lists sonar, digital guidance-and-control and digital fusing systems. MOD 7 is identified as the latest version in that fact file, updated November 15, 2023. U.S. Navy: MK 48 – Heavyweight Torpedo
Lightweight torpedoes can be launched from ships or aircraft
The Navy identifies the MK-54 as a surface-ship- and aircraft-launched anti-submarine weapon. The Department of the Navy’s FY2025 procurement highlights describe it as designed for littoral, or coastal, shallow-water acoustic and environmental conditions while also capable in deep-water engagements. That is an official design description, not a head-to-head performance test against a missile. U.S. Navy: MK 54 – Lightweight Torpedo; Department of the Navy: Strengthening Maritime Dominance – Procurement Highlights (FY2025)
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The MK-46 is another example of a lightweight anti-submarine torpedo. The Navy lists surface ships and aircraft as launch platforms and describes active or active/passive variants. These examples show why “torpedo” alone does not tell you which target or launch platform applies. U.S. Navy: MK 46 – Lightweight Torpedo
How do anti-ship missiles differ?
An anti-ship missile is designed to attack a surface vessel, but its launch options and flight guidance depend on the named system and variant. Harpoon illustrates the range of possible launch platforms: the Navy lists surface ships, submarines, shore batteries and aircraft. Its fact file describes a low-level cruise trajectory and active radar guidance; features vary by variant. U.S. Navy: Harpoon Missile
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Naval Air Systems Command describes Harpoon as an all-weather, over-the-horizon anti-ship missile system using mid-course guidance and a radar seeker. Its page also describes active radar guidance and terminal sea-skimming or pop-up maneuvers. These are Harpoon characteristics as described by NAVAIR, not rules that apply to every anti-ship missile. NAVAIR: Harpoon
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NAVAIR describes the Long Range Anti-Ship Missile (LRASM) as an air-launched anti-surface weapon for high-threat maritime targets. Its program description says the design reduces reliance on ISR platforms, network links and GPS, and uses semi-autonomous guidance algorithms. Those statements describe the program’s stated design, not independently reported comparative test results. NAVAIR: Long Range Anti-Ship Missile (LRASM)
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Can a missile carry a torpedo?
Yes. The U.S. Navy’s VLA/ASROC is a useful example of why “missile versus torpedo” is not always a simple either-or. The surface-ship-launched anti-submarine missile is designed to deliver an MK-46 or MK-54 torpedo to a water-entry point near a targeted submarine. The Navy fact file describes a solid-propellant booster and a ballistic trajectory for delivering the torpedo. In this arrangement, the missile is the delivery vehicle and the torpedo is the payload that continues underwater. The fact file was updated in 2021; it supports this weapon-concept example, not a claim about current inventory or status. U.S. Navy: Vertical Launch Anti-Submarine Rocket ASROC (VLA) Missile
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What can—and cannot—be compared?
The clearest general comparison is the medium of travel and broad mission: torpedoes move underwater and may be anti-submarine or anti-surface weapons; anti-ship missiles fly through the air to attack surface ships. Other characteristics must be compared system by system.
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- Guidance: The MK-48 is described by the Navy as acoustic-homing. Harpoon is described by NAVAIR and the Navy as using radar guidance. Those examples do not establish a single guidance method for either category.
- Launch platform: A weapon’s category does not determine every platform that can launch it. The MK-48, MK-54 and Harpoon examples have different platform combinations.
- Range, speed and effectiveness: The cited official sources do not provide a like-for-like comparison across torpedoes and anti-ship missiles. A universal ranking would therefore be misleading.
For a meaningful comparison, name the specific weapon and variant, then establish that any figures use comparable conditions and refer to the same kind of capability. Category labels alone cannot answer which weapon is faster, reaches farther or is more effective.
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